Using the Connections Tool |
Top Previous Next |
Connections is a network tool that lets you obtain information about current TCP/IP connections. You can use the Connections tool to query detailed listings of all TCP and UDP sockets on your system, including the local and foreign addresses and state of TCP connections. It also reports the icon and name of the process that owns each socket. To use the Connections tool, do the following:
The Connections tool displays the results in the Response area.
TCP
When this option is checked, the Connections tool queries a list of active sockets for TCP.
UDP
When this option is checked, the Connections tool queries a list of active sockets for UDP.
Host names
When this option is checked, the Connections tool uses the numeric host address associated with the socket to look up the corresponding symbolic host name.
Port names
When this option is checked, the Connections tool uses the numeric port number to look up the corresponding symbolic port name.
New connections in color
When this option is checked, the Connections tool displays new connections in color. A color-selection dialog box allows you to choose a specific color value. You can choose a color from either a set of basic or custom color palettes.
Refresh every [n] sec
When this option is checked, the Connections tool updates the results in the Response area every n seconds.
The possible state values for TCP sockets are as follows: CLOSED
Closed. The socket is not being used.
LISTENING
Listening for incoming connections.
SYN_SENT
Actively trying to establish connection.
SYN_RCVD
Initial synchronization of the connection under way.
ESTABLISHED
Connection has been established.
FIN_WAIT1
Socket closed. Shutting down connection.
FIN_WAIT2
Socket closed. Waiting for shutdown from remote.
CLOSE_WAIT
Remote shutdown. Waiting for the socket to close.
CLOSING
Closed, then remote shutdown. Awaiting acknowledgment.
LAST_ACK
Remote shutdown, then closed. Awaiting acknowledgment.
TIME_WAIT
Wait after close for remote shutdown retransmission. DELETE_TCB Delete TCB. Tips:
Note:
Connections example: |